I know neither yours nor my comment strictly related to the topic - which is about not breaking builds, but the effect of latency on a web page only has a tiny

I know neither yours nor my comment strictly related to the topic - which is about not breaking builds, but the effect of latency on a web page only has a tiny contribution to conversion rates or other user satisfaction metrics as compared other factors - like stability and features. Hence, I think it's not _important_ for most web programmers to be hyper-aware of the latency - as long as it's reasonable.